Home
Class 12
CHEMISTRY
Which of the following is correct regard...

Which of the following is correct regarding the reaction of ketones with ethylene glycol in the presence of dry HCl? The product obtained is ethylene glycol hemi-ketal, In this reaction, electrophilicity of carbonyl carbon decreases, HCl protonates the oxygen of the carbonyl group, The product thus obtained is cyanohydrin

A

The product obtained is ethylene glycol hemi-ketal

B

In this reaction, electrophilicity of carbonyl carbon decreases

C

HCl protonates the oxygen of the carbonyl group

D

The product thus obtained is cyanohydrin

Text Solution

Verified by Experts

The correct Answer is:
C
Ketones react with ethylene glycol in the presence of dry HCl to form cyclic products known as ethylene glycol ketals.

In the above reaction dry HCl protonates the oxygen of the carbonyl compounds and therefore, increases the electrophilicity of the carbonyl carbon facilitating the nuclcophilic attack of ethylene glycol.
Promotional Banner

Topper's Solved these Questions

  • ALDEHYDES AND KETONES

    BRILLIANT PUBLICATION|Exercise LEVEL-II|42 Videos

  • ALCOHOLS, PHENOLS AND ETHERS

    BRILLIANT PUBLICATION|Exercise LEVEL III (Linked Comprehension Type) |12 Videos

  • BIOMOLECULES, POLYMERS AND CHEMISTRY IN EVERYDAY LIFE

    BRILLIANT PUBLICATION|Exercise LEVEL-II (ASSERTION-REASON TYPE QUESTIONS)|6 Videos

Similar Questions

Explore conceptually related problems

Which of the following statements regarding carbonyl group is not correct? The carbon atom of the carbonyl group in aldehydes and ketones is sp^(2) hybridised, The carbon atom of the carbonyl group in the transition state formed during the addition reaction across it sp^(3) hybridised, An aryl group stabilizes an aldehyde more than the transition state, The aryl group in aromatic aldehydes speeds up the addition reaction across the carbonyl group

Treatment of a carbonyl compound with hydrazine produces hydrazone in presence of glycol as the solvent. Which of the following statements are correct about this reaction? The reaction involves nucleophilic addition followed by elimination of water Hydrazone is an intermediate in Wolff-Kishner reduction The reaction is carried out in freebly acidic medium 1, 2, and 3

Aldehydes and ketones are amphoteric. Thus they can react both as acids and bases. Under acidic conditions, the carbon of the protonated carbonyl group is much more electrophilic, reacting even with weak necleophile. Carbonyl compound gives nucleophilic addition reaction. In this reaction the nucleophilic attack precedes the electrophilic attack. Which of the statements regarding nucleophilic addition to carbonyl compounds "is"//"are" correct?

Two groups of students were studying the reaction of HBr on alkenes. The first group treated but-1-ene with HBr and the other treated but-1-ene with HBr in presence of benzoyl peroxide:What would have been the product obtained if they had used HCl instead of HBr. Explain.

predict-the-product-c-obtained-in-the-following-reaction-of-1-butyne CH3CH2 - C ≡ CH + HCl → B + HI → C

BRILLIANT PUBLICATION-ALDEHYDES AND KETONES -LEVEL-II
  1. Which of the following is correct regarding the reaction of ketones wi...

    Text Solution

    |

  2. The general formula of aliphatic saturated aldehydes and ketones is:

    Text Solution

    |

  3. The IUPAC name of the compound

    Text Solution

    |

  4. A single compound of the structure : OHC-CH(2)-overset(CH(3))overset(|...

    Text Solution

    |

  5. Predict the correct intermediate and product in the following reaction...

    Text Solution

    |

  6. The reaction temperature of the preparation of butanal by the oxidatio...

    Text Solution

    |

  7. The most suitable oxidising agent for the conversion of cyclohex-2-en-...

    Text Solution

    |

  8. Which one of the following on alkaline hydrolysis produces a ketone? ...

    Text Solution

    |

  9. The compound which is formed during the dry distillation of calcium be...

    Text Solution

    |

  10. X & Y are respectively

    Text Solution

    |

  11. The reaction by which benzaldehyde cannot be prepared is

    Text Solution

    |

  12. Which of the following pathways does not produce hexan-2-one?

    Text Solution

    |

  13. The major product of the following reaction is:

    Text Solution

    |

  14. In the following reaction: Aldehyde + Alcohol overset("Dry HCl")rarr A...

    Text Solution

    |

  15. The major product X formed in the following reaction is

    Text Solution

    |

  16. The reagent 'X' to be used for this conversion is

    Text Solution

    |

  17. The most suitable reagent (Y) for the following conversion is

    Text Solution

    |

  18. Under Clemmensen or Wolff-Kishner conditions of reduction, the convers...

    Text Solution

    |

  19. Compound 'X' (C(3)H(8)O) is treated with acidified K(2)Cr(2)O(7) to fo...

    Text Solution

    |

  20. Match the following:

    Text Solution

    |

  21. When pentan-2-one is treated with conc. HNO(3) at elevated temperature...

    Text Solution

    |